If you are aware of irregular signs on your vehicle, you are right to be preoccupied, because a car represents a huge annual budget and surprising malfunctions don’t reduce the costs. So what if you find that you have a leaking injector on your Audi Rs4? You probably figured it out thanks to black/oily drips along your engine motor, or a disturbed idle, or abnormal black smoke. These three signs of illness are the main signals of a leaking injector. As this failure can produce more significant engine problems on your car, we chose to compose this article content to help you confirm the failure of a leaking injector and handle it properly. To accomplish this, we will first look at the case of gasoline injectors and then at those of diesel injectors Audi Rs4.
Leaking injector on my petrol Audi Rs4
It is crucial to know that the injectors on petrol and diesel engines are distinct, in reality, the difference in combustion between these two types of engines makes the injection distinct. The biggest difference lies in the pressure experienced by the injectors, on a petrol engine it will vary between 3.5 bars for indirect injection and 120 bars for indirect injection.
Leaking injector on a petrol Audi Rs4: The different leaks
It should be known that injector leaks on a Audi Rs4 equipped with a petrol engine are pretty infrequent. This is caused by the much lower pressure in the petrol intake systems. Even so, there are two types of leaks:
- Leakage from the top of the injector:
It is conceivable that you have a leak from the top of the injector, this is the component that is connected to the fuel rail, an O-ring will be involved in this. - Leak injector of the lower part:
At last, you may experience a leak coming from the lower portion of the injector of your car, this one will come from the junction with the engine and not with the rail as seen sooner.
Leaking injector on my diesel Audi Rs4
Unlike petrol engines, which have spark combustion, diesel engines run on compression. This combustion procedure creates very high pressure in the engine, as do the injectors. On these models, the pressure is more than 10 times higher than on the direct injection of car petrol engines, reaching 1800 to 2000 bars.
Leaking injector on diesel Audi Rs4: The different leaks
In the case of leaking diesel injectors on your Audi Rs4, there are three several types of leaks:
- Leakage from the injector inlet:
In this case, it is an inlet pipe that will deform along with time, in most cases the leak will be at the clamping point. - Injector return leakage:
As its name suggests, this leakage relates to the management of the fuel return in the injector, this time the injector that leaks on your Audi Rs4 will be caused by an O-ring or its plastic tip that leaks. - Injector base leak:
This injection leak is one of the most bothersome, it is the junction between the engine and the injector nose that leaks at a copper seal, you should feel an air noise and a compression loss. - If after verifying you have oil leaking but it does not come from your injectors, we advise you to browse this article content on the presence of oil leaking on your Audi Rs4.
Leaking injector on my Audi Rs4, how to fix the leak
And at last, we’re going to look at how to fix a leaking injector on your car. Frequently a leak is linked, as we have seen prior to this, to a worn seal as a result of the pressures suffered. But think that the pressure in the circuit is monumental, especially on diesel engines. So you will have to take some measures:
- Lower the pressure before any work is completed…
- Masking you to avoid the risk of fuel spillage
- NEVER work on a running diesel engine injector.
Relating to the repair part of your leak, it will oftentimes be restricted to swapping the seals that have failed:
- Situate the source of the leak
- Dismantle the injector in question
- Change the corresponding seal kit
- Reassemble the assembly and tighten with a torque wrench in respect with the manufacturer’s standards.
In all situations, these interventions are not automatically very hard, but if you have the smallest uncertainty in the treatment of your injector that leaks on your Audi Rs4, we advise you to get closer to your mechanic to avoid any bad manipulation that could seriously harm the condition of your Audi Rs4.
In the event that you have any additional questions about the Audi Rs4, do not hesitate to consult our Audi Rs4 category.
